{
  "type": "railcraft:rolling",
  "key": 
  {
    "a": {"item": "immersiveengineering:wire_copper"},
	"s": {"item": "immersiveengineering:stick_treated"}
  },
  "pattern": [
    "aaa",
	"asa",
	"aaa"
  ],
  "processTime": 800,
  "result": {
    "item": "railcraft:charge_spool_large"
  }
}